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- W2008024881 abstract "WD 1704+481 is a visual binary in which both components are white dwarfs. We present spectra of the Hα line of both stars which show that one component (WD 1704+481.2=Sanduleak B=GR 577) is a close binary with two white dwarf components. Thus, WD 1704+481 is the first known triple degenerate star. From radial velocity measurements of the close binary we find an orbital period of 0.1448 d, a mass ratio, qMbrightMfaint, of 0.70±0.03 and a difference in the gravitational redshifts of 11.5±2.3 km s−1. The masses of the close pair of white dwarfs predicted by the mass ratio and gravitational redshift difference combined with theoretical cooling curves are 0.39±0.05 and 0.56±0.07 M⊙. WD 1704+481 is therefore also likely to be the first example of a double degenerate in which the less massive white dwarf is composed of helium and the other white dwarf is composed of carbon and oxygen." @default.
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- W2008024881 date "2000-05-11" @default.
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- W2008024881 title "The triple degenerate star WD 1704+481" @default.
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- W2008024881 doi "https://doi.org/10.1046/j.1365-8711.2000.03343.x" @default.
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